fix the problem with device discovery seen by some people.
2. Change to make 3ware CLI/3DM work on amd64.
3. Fix a potential problem that could cause the driver to do strlen(NULL) when
using older firmware.
Reviewed by:scottl
The main changes are:
1. Use of multiple bus dma tags.
2. Timing of CAM requests by the driver.
3, Firmware interface change relating to retrieving AEN's.
4. Removal of twa_intrhook.
5. Bundling of latest firmware with BBU capability.
Reviewed by:re
Approved by:re
